Music box project

Box will be made out of wood, prototype of carton 

finalisation of lazer cut for the box and platform

While the cylinder itself will be exposed to very little stress, the gearing will face considerably more

Due to expected stresses exerted upon the driving gear and those dedicated to the governor, it would seem they will need to be metallic or otherwise sturdier than a simple 3D printing

For that reason, we will need to look at using standardized parts in order to simplify the building process

The purpose of the governor in the system is to ensure a stable speed of the cylinder

It accomplishes this goal by increasing its rotational inertia the faster the device is turning

It does so by having a pair of mobile counterweight that get higher and further from the axle as the rotation speed increase

We will be using a version of the mechanism called the Watt Governor

This version is fully passive, with no tuning component beyond the mass of the counterweights

For our purpose, the ideal situation would be a rotation speed between 150 and 200 rpm with counterweight somewhere between 15 and 20 grams per counterweight

The user is deemed to spin the handle between 60 and 120 rpm

With the current gear shaft, this means the driving gear will go from 12 to 24 rpm

In order to reach our operating rotational speed, we need to have a gear ratio in the neighborhood of 15 between the driving gear and the governor.

Speed regulation of the system will be done using a governor.

Found what kind of governor to use (Watt governor, fully gravity driven)

Started to look at requirements for manufacturing

Fine tuning will be done once prototype is assembled

started model of worm gear and handle.

• Recived the kalimba. We worked with fusion 360°to upload the kalimba into the program then we measured the, angles, and size of the cylinder to fit the kalimba and the tines(notes). 

Decision upon the actual project : making a music box

Research of requirements for said project

Identification of 4 main requirements for it : resonance chamber, metal prongs, cylinder, rotation mechanism

The first two requirements are solved by using a kalimba as a base.

Working on the other two